How do I use me Apple Pencil 2

See here:

https://support.apple.com/guide/ipad/pair-and-charge-apple-pencil-2nd-generation-ipad51ac5369/ipados

Make sure the tip of the Pencil is screwed on securely and snugly ( NOT TOO tight! ).

Then follow all of the troubleshooting tips in this Apple Website Webpage support article.

Tap the link below.

https://support.apple.com/en-us/HT205236

Also, have you checked the tip of your Pencil lately?

Does it look worn?

Apple has a 4 pack of replacement tips for purchase.

Found here.

Tap the link below.

https://www.apple.com/shop/product/MLUN2AM/A/apple-pencil-tips-4-pack

Best of Luck to You!

What year and model iPad do you own?